Paper Quilling Strip Length Calculator
Calculate quilling paper strip length for coils, scrolls, and pinched shapes by target diameter.
Get strip length in inches and millimeters.
Strip Length Needed
Paper Quilling Strip Length Estimation
Quilling shapes are made by rolling thin paper strips into coils, then pinching or shaping them. The strip length needed depends on the target diameter and paper thickness.
The basic spiral length formula: For a tight coil with paper thickness t and final radius R: Length L ≈ π × R² / t
This is the spiral arc length approximation. Real-world strips are slightly longer due to gluing and pinching.
Common quilling paper widths and thicknesses:
| Strip Width | Paper Thickness |
|---|---|
| 1/8 inch (3 mm) | 0.13 mm (24 lb) |
| 3/16 inch (5 mm) | 0.13 mm (most common) |
| 1/4 inch (6 mm) | 0.18 mm |
| 1/2 inch (12 mm) | 0.24 mm |
Strip length needed by tight coil diameter (3/16-inch standard width):
| Diameter | Strip Length |
|---|---|
| 1/4 inch (6 mm) | 4-5 inches |
| 3/8 inch (10 mm) | 7-8 inches |
| 1/2 inch (13 mm) | 11-13 inches |
| 3/4 inch (19 mm) | 22-26 inches |
| 1 inch (25 mm) | 38-44 inches |
Adjustments by shape type:
- Tight coil: 100% of base length
- Loose coil: 70% of base length (the open center reduces required strip)
- Open scroll: 60% — only the outer turn needed
- Marquise / teardrop: 100% — same strip, just pinched
- Square / rectangle: 100% — pinched at corners
- Petal / leaf shape: 90-100%
Practical tips:
- Always cut 10-15% extra to allow for gluing the tail
- Strips longer than 24 inches can be joined mid-roll, but the joint may show
- Heavier paper (60+ lb) requires more length per coil because of higher thickness
- Test-roll one strip first when working with a new paper weight